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Friday, 29 December 2017

Name any 20 Unisexual and Bisexual Flowers.

  By GK Planet Team       Friday, 29 December 2017

Unisexual and Bisexual Flowers: Definition, Examples & Differences


  Plant reproductive morphology is the study of the physical form and structure (the morphology) of those parts of plants directly or indirectly concerned with sexual reproduction.

Definitions of Unisexual & Bisexual Flowers

Bisexual Flower
  Each flower of each individual has both male and female structures, i.e. it combines both sexes in one structure. Flowers of this kind are called perfect, having both stamens and carpels. Other terms used for this condition are androgynous, hermaphroditic, monoclinous and synoecious.
  Bisexual flowers are complete flowers, containing both androecium and gynoecium in one flower. Therefore, bisexual flowers contain both stamens and pistils in the same flower. Hence, bisexual flowers are called hermaphrodite or androgynous flowers as well.
  In bisexual plants, both self pollination and cross pollination can occur due to the presence of both reproductive organs in the same flower itself.
  The pollination within the same flower is called autogamy. Geitonogamy is the pollination between different flowers on the same plant. Cleistogamy is the pollination of the flower before its opening.
Examples of Bisexual Flowers
Bisexual flowers: Lily, Rose, Sunflower, Tulip, Daffodil, Mustard, Brinjal, Hibiscus, Tomato, Long bean, Chille, Country bean, mango.
Unisexual Flower
  Unisexual flowers are having either functionally male or functionally female flowers.That means, androecium, which is the male reproductive structure and gynoecium, which is the female reproductive structure, are found in separate flowers. The flowers containing the androecium are called male flowers and the flowers containing gynoecium are called female flowers. This condition is also called diclinous, incomplete or imperfect.
  Plants containing unisexual flowers can be divided into two as monoecious and dioecious plants. Monoecious plants are capable of undergoing both self and cross-pollination due to the presence of both male and female flowers in the same plant. In contrast, dioecious plants only undergo cross-pollination.
Examples of Unsexual Flowers
  Unisexual flowers: Coconut flowers, Papaya, Watermelon, Cucumber, Maize, White mulberry, Muskmelon, Castor bean, Marrow, Luffa, Snake gourd, Bitter gourd, Tapioca, Pumpkin, American holly, Birch, Pine, Gopher purge, Tung oil bean. 

Difference between Unisexual and Bisexual Flowers

  A "perfect" flower has both stamens and carpels, and may be described as "bisexual" or "hermaphroditic". A "unisexual" flower is one in which either the stamens or the carpels are missing, vestigial or otherwise non-functional.
  Unisexual flowers contain male and female reproductive organs in separate flowers whereas Bisexual flowers contain both male and female reproductive organs in the same flower.
  Both unisexual and bisexual flowers are involved in the sexual reproduction of angiosperms. Unisexual flowers contain androecium and gynoecium in separate flowers, whereas bisexual flowers contain both androecium and gynoecium in the same plant.
  In some plants, both male and female flowers occur in the same plant. These plants are called monoecious plants. Corn is the most common monoecious plant. In dioecious plants, either male or female flowers may occur.
  Bisexual flowers can undergo both self and cross-pollination due to the presence of both reproductive organs in the same flower; hence, they are called androgynous flowers. However, the main difference between unisexual and bisexual flowers is the presence of male and female reproductive organs in the flower.
Frequently Asked Questions & Answers

Name any 20 unisexual and bisexual flowers.

Examples of Unisexual and Bisexual Flowers for class 7th

Bisexual flowers: Lily, Rose, Sunflower, Tulip, Daffodil, Mustard, Brinjal, Hibiscus, Tomato, Mango, Chilli, Long bean and also country bean, petunia, Delonix regia, sweet peas, African violet, jasmine, passion flower, horse nettle

Unisexual flowers: Papaya, Watermelon, Cucumber, Maize, bitter gourd, pumpkin muskmelon, castor bean, white mulberry, snake gourd, birch, pine, tapioca, coconut flowers, tung oil bean, marrow, luffa, American holly, gopher purge
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